Combination wall mounted water closet and flush tank with siphon leg



March 24, 1959 J. H. SCHMID 2,878,483

COMBINATION WALL MOUNTED WATER CLOSET AND FLUSH TANK WITH SIPHON LEG Filed July 10, 1956 INVENTOR- Tchn Schm C1 WXM -the siphon action.

the bottom of the bowl and the floor. portion of the siphon leg must be built into the bowl above floor level.

; sanitary operation. the air following the water to act as an air lift and thus trap, and breaks the siphon, the up leg to drop back into the bowl.

, COMBINATION WALL MOUNTED WATER CLOSET AND FLUSH TANK WITH SIPHON LEG John H. Schmid, Westfield, N.J., assignor to J. A. Zurn Mfg. (10., Erie, Pa., a corporation of Pennsylvania Application July 10, 1956, Serial No. 597,041

6 Claims. (Cl. 4-14) This invention relates to water closets and, more par- .ticularly, to the type of water closet known as a wall hung water closet in combination with a flush tank.

This application is a continuation in part of applica- '.-tion, Serial No. 495,207, filed March 18, 1955, in which I am one of the inventors.

' .Upuntil the present time, no one has provided a wall type water closet in combination with or adapted to be supplied with flushing water from a static head flush tank which will give satisfactory flushing action. One reason for this is that no one has been able to provide a Wall supported water closet having a satisfactory siphon action in an economical size bowl.

The present type of wall hung water closet commonly in use utilizes a flush valve and water supplied through a large pipe in order to provide the large quantity of -Water in a short time which is necessary to perform the flushing action in the bowl. A large supply of water under pressure is necessary to carry out satisfactory .flushing in the presently known wall type water closet characteristics.

Water closets which have been used in combination with flush tanks have always been of the floor mounted type because by mounting the water closet on the floor, v the siphon legs can be extended down as far as the floor and, since the space below the bowl can be utilized for a down leg or siphon leg, effectively long siphon legs can be used. It has been discovered that the extra length of the down leg of a floor type closet as compared to that of a conventional wall type closet greatly increases If the conventional wall type closet commonly used with a flush valve were to be used with a flush tank, several problems would confront the designer.

' First, a siphon Therefore, a

This will not give a desirable differential siphon head. Second, with the bowl properly located a sufficient distance in front of the wall to accommodate a conventional flush tank and seat arrangement and the up leg sloping rearwardly and upwardly, thelegwould have too slight a slope to give satisfactory This is because with a steep up leg, as the bowl empties tends helps to carry the flushing water up and over the trap weir. When the angle of the siphon is decreased, entrained air merely bubbles up through the water, gathers above the water in the leaving water and solids in Also, these bowls all have the common defect that at the point of breaking of the siphon, the air This results in a small dif- United States Patent leg cannot be put in the space between does not elfectively re arrangement,

2,878,483 Patented Mar. 1559 .move water in the dip of the trap; that is, no appreciable tial head described above which are present in the conventional floor type closet can be recaptured in a wall type closet utilizing a tank by using a long siphon down leg behind the wall in combination with a wall hung water closet having a steep up leg and a horizontal section between the two legs. This adds as much as five inches or more of effective head to'the siphon which means that the siphon has the head thereof increased more than one hundred percent. Therefore, by use of the siphon leg, the wall hung closet has the static head advantages of a fioor type water closet and other advantages not ordinarilypresent in a wall mounted closet.

It is, accordingly, an object of this invention to provide a wall type water closet which overcomes the above and other disadvantages in present water closets and, more particularly, it is an object of this invention to provide a wall type water closet which is simple in construction, economical to manufacture, andsimple and Another object of this invention is to provide a wall type water closet in combination with a flush tank.

Another object of the invention is to provide an improved siphon-leg in combination with a specific siphon trap in a wall type water closet.

A further object of this invention is to provide a closet bowl'adapted to be located far enough in front of a wall to accommodate a conventional flush tank and seat the down leg being located in the wall while an up leg extends upwardly and rearwardly at an angle of greater than thirty degrees to a horizontal directly behind the bowl with a horizontal section to. the top of the down leg.

A still further object of the invention is to provide a wall type water close in combination with a flush tank and siphon leg wherein the siphon leg has the additional function of a support for the closet. 7

With the above and other objects in view, the present invention consists of the combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportions, and minor details of construction without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing:

Fig. 1 shows a water closet in combination with a flush tank according to the invention;

Fig. 2 shows another embodiment of a wall type water closet in combination with a flush tank according to the invention; 1

Fig. 3 is an enlarged view of the siphon leg which may be used with the closet shown in Fig. 2 according to the invention; and

35 to a horizontal leg 26 in the water'and air following the water to rise therewith rather than forming a layer 'action. At lesser angles, air

Fig. 4 isa view of asiphon leg which may be used with the closet shown in Fig. 1.

Wall type closet as used heerin defines a closet supported by any appropriate means against a wall above the floor of a room.

Now with more specific reference to the drawing, in the embodiment of the invention shown in Fig. l, a closet has an open top bowl 11 with a seat 22 pivoted to a horizontal ledge 13 at 23 and a flush tank 12 supported thereon. The bowl 11 has a waterway comprising an upwardly and outwardly extending leg defining a trap 14 which extends upwardly and backward from a bottom 18 of the bowl 11 at an angle of greater than thirty degrees and then downwardly by way of a leg which terminates at a wall 40 in a flange 27 and is attached to a curved siphon leg disposed behind the front of the wall 40. The flange 27 is attached to the leg 25 by means of bolts 42 which .engage holes in ears 40a and, also, by a bolt 37 which ;threadably engages a bore in the leg 25.

The down leg portion of the curved siphon leg 25 preferably presents or provides a contoured path for the flow of water which extends downwardly and is disposed inside the wall 40 of a building or the like. This contoured interior presents a tortuous path for water to flow through, thereby effecting siphonic action.

As mentioned supra, the trap 14 extends upwardly at an angle of greater than thirty degrees since it has been discovered that at this angle and greater, air entrained the water tend to urge of air over the top of the water, thus hindering siphonic will bubble up through the water and form a layer thereover as aforesaid and unsanitary action will result.

In Fig. 2, another embodiment of the invention is shown wherein a water closet 110 has a bowl 111 which terminates at the bottom in a sump portion 118. The bowl 111 has an upwardly and outwardly extending passage defining a trap 114 extending upwardly and outwardly at an angle of greater than'thirty degrees. The

trap 114 then extends back from the bowl 111 through a horizontal portion 126. An integral siphon leg passage 125 is disposed in a wall 140 and has its lower end attached to a suitable drain while its upper end turns forward and is attached to the horizontal portion 126. The relatively long horizontal leg portion 126 terminates in a flange 127 at the wall 140 and may be attached to the siphon leg 125 as shown. The length of the horizontal leg portion 126 is greater than the diameter of the pas sage comprising horizontal leg portion 126. A flush tank 112 is supported on a horizontal ledge 113 and a seat 122 is hinged to the ledge 113 at 123.

Because of the steep angle at which the trap 114 extends upwardly from the bottom of the sump portion 118 of the bowl 111, when flushed, water in the bowl 111 will be siphoned out of the bowl 111 and any air which is entrained in the water going out will tend to lift the water with it as it rises up through the trap 114 rather of air on top of the water to inhibit siphonic action and promote unsanitary action as would be the case if the trap extended upwardly and outwardly at a lesser angle. By regulating the effective length of the siphon leg contained in the wall, optimum siphonic action can be accomplished.

A jet familiar to those skilled in the art may be added in the bowls 11 and 111 at a conventional location to assist sanitary action.

Figs. 3 and 4 show enlarged views of the siphon legs 125 and 25, respectively, for use in a single or multi-story building wherein drainage pipes 105 and 5, respectively,

are adapted to extend upward between the wall members 31, respectively, to continue the drainage pipes and 5 up through the building whereby other siphon legs from washrooms or other floors may be connected thereto in cascade fashion. A suitable relief vent connection could be added to the pipes 105 and 5 if desired. The siphon legs 125 and 25 are cast integrally with the drainage pipe sections 105 and 5, respectively, and are integrally attached thereto at 136 and 36, respectively. Bolts 137 and 37 are provided to extend through the flanges 127 and 27, respectively, on the lower rear portion of the water closet and ears 119 and 19 are provided on the upper portion to receive bolts 142 and 42, respectively, for attaching the upper portion of the water closets and 10 to the siphon legs and 25, respectively. Ears 138 shown in Figs. 2 and 3 are illustrative of a means for fastening the device to a building structure. A transverse structural member is supported in the wall and the ears 138 are attached thereto.

The siphon legs 125 and 25 have curved portions therein. These curves and contours comprise a contoured or devious path to introduce turbulence into the water and thus reduce its velocity and, therefore, promote siphonic action.

The foregoing specification sets forth the invention in its preferred practical forms but the structure shown is capable of modification within a range of equivalents, for example, the up leg could be located in front of the bowl as in a siphon Wash down closet with the horizontal section under the bowl connecting with a down leg in the supporting fitting, without departing from the invention which is to be understood is broadly novel as is commensurate with the appended claims.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. In combination, a wall type closet and a flush tank comprising an open topped bowl having a front and a rear end, a sump in the bottom of said bowl and terminating at the upper edge in an upper rim, said bowl having a ledge adjacent the rear end thereof generally flush with said upper edge for supporting a flush tank, said flush tank supported on said ledge, a part of said ledge adapted to be disposed adjacent a wall, said ledge extending from said wall to said opening in said top of said bowl, said flush tank supplying flushing water to said sump, means attached to said bowl to support said bowl adjacent said wall and in spaced relation to a floor with said wall engaging means thereagainst, and trap means comprising an upwardly and rearwardly extending passage extending upwardly and rearwardly at an angle of greater than thirty degrees to the horizontal, a siphon leg, said passage having a horizontal portion extending from the upper end of said upwardly and rearwardly extending passage said ledge and communicating with said siphon leg, said horizontal portion of said passage being of substantially greater extent than the diameter of said passage, said siphon leg being connected to said closet and extending downwardly from said horizontal portion.

2. The combination recited in claim 1 wherein a seat is swingably connected to said closet in front of said flush tank and adjacent the front edge of said ledge.

3. The closet recited in claim 1 wherein said integral trap terminates at the end of said upwardly and outwardly extending passage in a flanged portion and said siphon leg is attached to said flanged portion, said siphon leg being disposed in the wall of a building, said siphon leg having a contoured passage therein whereby siphonic action is facilitated.

4. The closet recited in claim 1 wherein said means for connecting said sump to a sewer comprises said siphon leg adapted to be disposed in the wall of a building and extending downwardly from said sump, said siphon leg having a contoured waterway therein whereby siphonic action is facilitated.

5. The closet recited in claim 4 wherein said means to support said closet is attached to and supported on said siphon leg.

References Cited in the file of this patent UNITED STATES PATENTS Scott June 18, 1895 6 Mann Feb. 13, 1912 E'binger et al. Jan. 23, 1917 Kersten Apr. 19, 1932 Zwermann Feb. 11, 1936 Groeniger Mar. 8, 1938 Hoffmann Sept. 3, 1940 Hoifmann Apr. 28, 1942 

